References
- Andrews, J. T., 1975: Glacial systems. Duxbury Press, North Scituate. 191 p.
- Andrews, J. T. and Miller, G. H., 1972: Quarternary (sic) history of northern Cumberland Peninsula, Baffin Island, N. W. T., Canada: part IV: maps of the present glaciation limits and lowest equilibrium line altitude for north and south Baffin Island. Arctic and Alpine Research 4: 45–59.
- Benedict, J. B., 1973: Chronology of cirque glaciation. Colorado Front Range. Quaternary Research 3: 584–599.
- De Gruyter, D. A., 1976: Glacial geology of the Sierra Nevada de Santa Marta. Colombia. Ohio State University, unpublished M. Sc. thesis. 130 p.
- Flint, R. F., 1971: Glacial and Quaternary geology. Wiley, New York. 892 p.
- Lorenzo, J. L., 1964: Los glaciares de México. Segunda edición. Monografias del Instituto de Geofisica, Universidad Nacional Autónoma de México. 1. 124 p.
- Oslash;strent, G., 1964: Ice-cored moraines in Scandinavia. Geogr. Ann. 46: 282–337.
- Oslash;strent, G. 1966: The height of the glaciation limit in southern British Columbia and Alberta. Geogr. Ann. 48 A: 126–138.
- Porter, S. C., 1970: Quaternary glacial record in Swat Kohistan. West Pakistan. Geol. Soc. Amer. Bull. 81: 1421–1446.
- Porter, S. C. 1975: Equilibrium-line altitudes of late Quaternary glaciers in the southern Alps. New Zealand. Quaternary Research 5: 27–47.
- Porter, S. C. 1979: Hawaiian glacial ages. Quaternary Research 12: 161–187.
- White, S. E., 1954: The firn field on the volcano Popocatépetl, Mexico. Journal Glaciology 2(16): 389–392.
- White, S. E. 1956: Probable substages of glaciation on Iztaccíhuatl, Mexico. Journal Geology 64: 289–295.
- White, S. E. 1962: Late Pleistocene glacial sequence for the west side of Iztaccíhuatl, Mexico. Geol. Soc. Amer. Bull. 73: 935–958.
- White, S. E. 1978: Acontecimientos glaciales y periglaciales en el Ajusco. Instituto Nacional de Antropología e Historia, Boletín. III (22): 51–56.
- White, S. E. 1981: Neoglacial to recent glacier fluctuations on the volcano Popocatépetl, Mexico. Journal Glaciology 27(96): 359–363.
- White, S. E., Reyes-C., M., and Ortega-R., J., 1982: El Ajusco: acontecimientos glaciales y periglaciales durante el Pleistoceno Superior. Instituto Nacional de Antropología e Historia. Investigaciones: (in preparation).